i am 16 yrs last year during September i masturbated for the 1st time. then during one December night during sleep one picture flashed my mind & my pant was wet like this it continued every month till April & i was happy in between without anything but now once before two weeks again it happened.i didnt even think anything that time (so was i earlier) yesterday i watched a porn (1st time ) & there was an arousal and again semen came out. this is my situation is there any way to stop it am i still fertile after all this. is masturbating good or bad(with my knowledge i did only twice a year ago)